1. Alversen, K. Nature 434, 19–20 (2005).
2. Reducing Disaster Risk: A Challenge for Development (United Nations Development Programme, 2004).
3. World Disasters Report 2005 (International Federation of Red Cross and Red Crescent Societies, 2005).
4. Living with risk: A global review of disaster reduction initiatives (International Strategy for Disaster Reduction, 2004).